>>cote: making aluminium out of clean, renewable, hydro-power typically emits 5 to 8 times less thanwhat it is produced on coal. we have a bias for clean energy, so sarawak offering a large scale clean, renewable, hydro-electricity presents significant interest for us. and i would add in addition to hydro-electricity, it is offering skilled workforce and it's very close to, very high-growth markets; all critical factors in decisions of investment for us. >>reporter: rio tinto is currently negotiating a power purchase agreement which could see it settingup a $2b smelter, creating three thousand direct jobs, and another 6,000 regionally. the company's aluminium production has increased by 62% since 1990... but its green house gas emissions have decreased by 47% at the same time.